Kneading-machine.



F. AESCHBAGH. KNEADING MACHINE.

APPLICATION FILED JUNE 6, 1910.

Patented Nov. 19, 1912.

FRIEDRICH AESCHBACH, 0F AARAU, SWITZERLAND.

KN'EADING-MAC'HINE.

Specification of Letters Patent.

PatentedNov. 19, 19912.

Application filed June 6, 191). Serial No. 565,345.

To all whom it may concern.-

Be it known that I, FRIEDRICH Anson- BAOH, a citizen of the Republic of Switzerland, residing at Aarau, Switzerland, have invented certain new and useful Improvements in Kneading-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to'l'ett'ers or figures ofreference marked thereon, which form a part of .this specification.

The subject of the present invention is a kneading machine, more particularly adapted for treating bakers dough.

By means of the new machine the dough is first divided, turned over and mixed, by means of two tools operating in counterdirections, this constituting the first stage of the treatment. Hereupon the material is drawn outand pommeled or kneaded by practically only one tool, which constitutes the second stage of the treatment. Thus, for the correct treatment of the dough, such as has hitherto only been properly performed by hand, the material is worked. up by the machine in two separate operations or stages. That is to say, it is first torn apart, thrown over, and, especially the leaven, thoroughly mixed; whereupon the dough is so treated as to avoid tearing, but is drawn out and lifted, and the kneading operation thus completed.

My invention is illustrated in the accompanying drawing, which shows a preferred embodimentv of machine, parts unnecessary line GI-I of Fig. 1.

for an explanation of the invention being omitted.

Figure 1 is a section on the line AB of Fig. 2. Fig. 2 is a section on the line CD of Fig. 1. Fig. 3 is a section on the line EF of 1. Fig. 4 is a section on the a, is a rotary trough of familiar form; I) and c are two arms whose lower ends describe (in the construction illustrated) intersecting ellipses. To the arm b there is se: cured a comb-shaped agitator or beater d, the prongs or teeth 1'' of which are bent in the direction of motion. These teeth are blunt in front, as can be seen from Fig. 3, and are therefore not themselves adapted to divide the tough dough, catch it up and mix it. To the arm 0 a second comb-shaped beater g is secured, whose prongs or teeth h are so directed, that, on motion of the two heaters d, g in the paths indicated by the broken-lines in Fig. 1, they can pass between the teeth f. The teeth It, as 4 shows, are sharp in front, andare thus suited to cut or divide the dough. Owing to the mutual engagement of the two beaters, a shearing eflect will be produced, whereby the leaven is thoroughly torn asunder and mixed, such as is necessary during the first stage of workmg.

The arm a has a rack portion 71, and moves in a split guide is, having a screw m, whereby the arm 0 can be clamped in the desired position. With the rack part i there meshes a pinion n, operable by a handwheel o. In this manner the beater 9 may be gradually elevated, whereby the cutting effect can be slowly reduced, until total cessation. When the heater 9 has been thus elevated above the teeth f, the shearing motion of the two beaters stops and the beater 9 no longer 0pcrates on the dough. The beater d, with its blunt teeth f, now continues to work alone on the material, which therefore is now only drawn out and lifted.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In a kneading machine, a trough, two kneading arms therein, means arranged to move the arms in elliptical paths so that parts of the two arms pass each other in close proximity in counter directions from time to time to exert a shearing and mixing action on dough in the trough, and means to withdraw one of said arms from the dough whereby the remaining arm will not shear and mix, but draw and lift the dough.

2. In a kneading machine, a trough, two kneading arms tlierein mounted in parallel vertical planes, and means to move said arms in counter directed elliptical paths, the lower parts of said arms being arranged to pass each other in close proximity from time to time thereby exerting a shearing and mixing action on dough in the trough, and means to gradually withdraw one of said arms from the dough whereby the remaining arm will not shear and mix, but draw and lift the dough.

3. In a kneading machine, a trough, two

kneading arms therein, one of said arms having blunt teeth formed thereon at an angle to the arm, the other arm having teeth in the plane of the arm and sharp on the inner side, means for moving the arms in elliptical paths and in counter directions whereby the teeth of both arms shear and mix dough in the trough, and means to withdraw the last named arm from the trough whereby the remaining arm will not shear 10 and mix, but draw and lift the dough.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

FRIEDRICH AESCHBACH.

Witnesses:

ERNST Flsomm, CARL GUBLER. 

